package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;



    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.selectByUserName(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //完善登录：需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult queryByPage(EmployeePageQueryDTO employeePageQueryDTO) {

        //设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        //查询对象集合后返回
        List<Employee> employeeList= employeeMapper.selectByPage(employeePageQueryDTO);

        Page page = (Page) employeeList;
        return new PageResult(page.getTotal(),page.getResult());
    }


    /**
     * 员工新增
     * @param employeeDTO
     * @return
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee =new Employee();

        //使用拷贝工具，把设置的值封装进employee
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置状态
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码 使用DigestUtils 进行加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置创建时间和更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //设置创建和修改员工的操作人id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);


    }


    /**
     * 员工账号状态管理
     * @param status
     * @param id
     * @return
     */
    @Override
    public void statusManagement(Integer status, Long id) {
        Employee employee= Employee.builder().status(status).id(id).build();
        //不需要返回值，直接调用mapper层
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        //密码不能直接展示
        employee.setPassword("******");
        return employee;
    }

    /**
     * 修改员工，根据id查询回显
     * @param employeeDTO
     * @return
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //需要补全信息，缺少更新时间和更新人
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    /**
     * 员工密码修改
     * @param passwordEditDTO
     */
    @Override
    public void changePassword(PasswordEditDTO passwordEditDTO) {
        log.info("修改的信息：{}",passwordEditDTO);
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        //根据id查询员工信息比对密码
        String password = employeeMapper.selectById(passwordEditDTO.getEmpId()).getPassword();
        String oldpassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if (!(password.equals(oldpassword))) {
            throw new PasswordErrorException(MessageConstant.OLDPASSWORD_ERROR);
        }else {
            String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
            Employee employee = new Employee();
            employee.setPassword(newPassword);
            employee.setId(passwordEditDTO.getEmpId());
//            employee.setUpdateTime(LocalDateTime.now());
//            employee.setUpdateUser(passwordEditDTO.getEmpId());
            employeeMapper.update(employee);
        }
    }
}
